Scott 222C

[Patrice B]

Thanks for the photo's, now I now what to do.
Mine traffo isn"t hot at all, but it runs on 110 V with a very low neg. bias ( -7 ) That has to be fixed I suppose.
The 110V is because I have to use a step down traffo 220 V - 110 V , I am from Holland. ( that explains the writing )

-7!!! It sure doesn't sound as expected I guess.

 

[arnold58]

-7!!! It sure doesn't sound as expected I guess.

It sounded quite nice I thought, now waiting on a new rectifier.
But it's my first tube amp so I really don't now how it is suppose to sound.
I think I go the way like Thefragger did but I am not sure about the 0,15uF caps and what to do with it.

 

[tube-a-lou]

It sounded quite nice I thought, now waiting on a new rectifier.
But it's my first tube amp so I really don't now how it is suppose to sound.
I think I go the way like Thefragger did but I am not sure about the 0,15uF caps and what to do with it.

Hi,

Take them out and put the .1UF 630Volts that should be in there. That what
was in my LK48 (Scott 222C) I would stick to those.

tube

 

[Kegger]

I know you have 1 thermistor in the ac line, I've been using 1 CL-80 in each leg of
the AC line coming in on most vintage pieces and it tends to drop just about right.
(just in case you were still looking to get the ac line voltage down)

Congrats on getting yours rebuilt, the 222C is a nice piece, really like there iron..

 

[tube-a-lou]

Hey,
Where did everyone Go!

 

[the_nines]

Polished on the left, natural state on the right

What is that white "thing" still left on the chassis and is it supposed to get really hot?

I touched mine by accident and WOW, freakin' hot stuff.

Thanks.

 

[thefragger]

What is that white "thing" still left on the chassis and is it supposed to get really hot?

I touched mine by accident and WOW, freakin' hot stuff.

Thanks.

It's a power supply resistor and it's mounted above the chassis because it gets super hot!

 

[the_nines]

Thanks.

Awesome job, by the way.

:thmbsp:

 

[thefragger]

Thanks.

Awesome job, by the way.

:thmbsp:

No prob and thank you! Not bad for a first-go, eh?

 

[thefragger]

Rolled in my new-to-me pair of Matsushita (Mullard) 12AX7 tubes this morning before school and at first the bass sounded flabby and the treble sounded grainy, but as in a little as 10~15 minutes everything snapped into place! There are some awesome tubes and the extra gain gives my GE triple-mica black-plate 5751 a run for the money.

I could get into this tube-rolling-thing. :thmbsp:

I also swapped the phase inverter tubes and now the other channel is sizzling (with head next to speaker) :tears:

 

[kpaxfaq]

what is that white "thing" still left on the chassis and is it supposed to get really hot?

I touched mine by accident and wow, freakin' hot stuff.

Thanks.

yes!

That was the first thing I touched when I first got my Scott 222c to investigate. Needless to say I burnt the **** out of my finger and spend the rest of my evening listening with a bag of frozen peas on my finger! Haha

-Kory

 

[tube-a-lou]

Rolled in my new-to-me pair of Matsushita (Mullard) 12AX7 tubes this morning before school and at first the bass sounded flabby and the treble sounded grainy, but as in a little as 10~15 minutes everything snapped into place! There are some awesome tubes and the extra gain gives my GE triple-mica black-plate 5751 a run for the money.

I could get into this tube-rolling-thing. :thmbsp:

I also swapped the phase inverter tubes and now the other channel is sizzling (with head next to speaker) :tears:

That Happen to me with my amp, so I replaced all the resistors and
guess what it was still there, so I decided to change the phase inverter
section to take 6U8A tubes. I purchased a whole bunch and found a pair
that was very quiet!. Still have some more to test, but so fair so good
and besides I don't want to spend $50.00 for a tube (7199's) for
possibly the same sound. plus there are more tube choices.

Tube

 

[the_nines]

yes!

That was the first thing I touched when I first got my Scott 222c to investigate. Needless to say I burnt the **** out of my finger and spend the rest of my evening listening with a bag of frozen peas on my finger! Haha

-Kory

:lmao::lmao:

 

[Patrice B]

That Happen to me with my amp, so I replaced all the resistors and
guess what it was still there, so I decided to change the phase inverter
section to take 6U8A tubes. I purchased a whole bunch and found a pair
that was very quiet!. Still have some more to test, but so fair so good
and besides I don't want to spend $50.00 for a tube (7199's) for
possibly the same sound. plus there are more tube choices.

Tube

Yes, having some good phase splitters is a must. In my case (LK-72), they are 6GH8's. I've bought around ten of them to get a good not so noisy pair...

 

[mikey99]

Yes, having some good phase splitters is a must. In my case (LK-72), they are 6GH8's. I've bought around ten of them to get a good not so noisy pair...

My Scott 222B has the original Scott ECF80/6BL8's phase inverters...
These tubes say made in France, not sure what brand they really are....

What kind of improvements in the sound would I get if I update
these ? The amp sounds fine with these tubes, no hum or noise at all.
But I've read there are other tubes that work better .....maybe 6U8A
as suggested above?

 

[tube-a-lou]

My Scott 222B has the original Scott ECF80/6BL8's phase inverters...
These tubes say made in France, not sure what brand they really are....

What kind of improvements in the sound would I get if I update
these ? The amp sounds fine with these tubes, no hum or noise at all.
But I've read there are other tubes that work better .....maybe 6U8A
as suggested above?

Hi,
The 7199 were made for audio only I heard here, but there Costly
The 6BL8's I don't know much about, but if there working fine and sound
good leave it, also the price if there reasonable stay with them. :yes:

 

[Kegger]

Out of all the 6GH8 through the 6BL8 substitutes I find the 6BL8 head and shoulders
above the rest, and good European examples are hard to beat from my point of view..:thmbsp:

 

[thefragger]

Added tip jacks tonight;

​

 

[tube-a-lou]

O.K. I'm a novice here, what is the purpose of those?? Also
did you say once you had a problem with the sound in one
channel dropping out a little?

 

[nerdorama]

I'd like to know where you bought the nice tip jacks.
Thanks,
John